The only reason he postponed your arrest was to run this observance in hopes you did something that made his case stronger.

The altar boy hesitated, well acquainted with Father Knowles’ deep observance of church tradition… and, more importantly, with his foul temper when anything cast this time-honored shrine in anything but favorable light.

There are no more uses of "observance" in the book.

Show samples from other sources

As her release date neared, Vanessa got increasingly anxious, with a decided uptick in religious observance.